/*
 * Copyright 2008 Georgi Staykov
 * 
 * This file is part of pscoder.
 *
 * pscoder is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * pscoder is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with pscoder.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.gstaykov.pscoder.util;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IPathEditorInput;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.texteditor.AbstractTextEditor;
import org.eclipse.ui.texteditor.ITextEditor;

import com.gstaykov.pscoder.editor.completion.CompletionDictionary;
import com.gstaykov.pscoder.editor.completion.FileData;

public class Util {
        
    public static IDocument getActiveDocument(ExecutionEvent event) {
        IEditorPart part = HandlerUtil.getActiveEditor(event);
        IDocument doc = null;
        if ((part != null) && (part instanceof AbstractTextEditor)) {
            ITextEditor editor = (ITextEditor)part;
            doc = editor.getDocumentProvider().getDocument(editor.getEditorInput());
        }
        
        return doc;
    }
    
    public static IEditorPart getActiveEditor() {
        return PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
    }
    
    public static IResource getActiveFile() {
        IEditorPart editorPart = getActiveEditor();
        IEditorInput editorInput = editorPart.getEditorInput();
        if (editorInput instanceof IPathEditorInput) {
            IFile[] files = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocation(((IPathEditorInput)editorInput).getPath());
            // if more than 1 file matches return null because it is not clear which file is wanted
            return (files.length == 1)? files[0] : null;
        }
        
        return null;        
    }
    
    public static IProject getActiveProject() {
        return getActiveFile().getProject();
    }
    
	public static FileData getFileDataForActiveFile() {
		IResource activeFile = getActiveFile();
		String projectName = activeFile.getProject().getName();
		
		try {
			CompletionDictionary projectDictionary = CompletionDictionary.getInstance(projectName);
			return projectDictionary.getFileData(activeFile.getLocation().toFile().getAbsolutePath());
			
	    } catch (CoreException ce) {
	        Logger.getInstance().logError("Error while trying to get completion dictionary object: \n", ce);
	    }

		return null;
	}
    
	
	public static String convertFileNameToWindowsNotation(String fileName) {
		return fileName.replace('/', '\\');
	}

}
